Wind-stacker.



no. 75,063. Patented Dec. 2. I902.

c. HEARN. WIND STAGKER.

(Applicafiion filed Mar. 3, 1902.)

("0 Model.)

2F f 2% 1 a a I /////////A nm m Zww r5944 Gamm UNTTED STATES PATENTOFFIcE.

CHARLES HEARN, OF PORT ELGIN, CANADA.

WIND-STAC'KER.

SPECIFICATION forming part of Letters Patent No. 715,063, dated December2, 1902.

Application filed March 3, 1902. Serial No. 96,562. (No model.)

fans or blowers, such as are employed in windstackers forthreshing-machines, and has for its object to provide such a devicewherein a practically constant speed of rotation is maintained at alltimes, even though the driving power be variable or intermittent.

To more fully set forth my invention, reference will be had to theaccompanying drawings, wherein- Figure 1 is a side elevational Viewpartly in section, the fan-casing being omitted; and Fig. 2 is atransverse sectional view taken through the driving-pulley on the line 22, Fig. 1.

In the views, A represents the fan orblower, of any desiredconstruction, rigidly mounted upon the driving-shaft B. Mounted uponthis shaft B are one or more fly-wheels C O, rigidly secured upon theshaft B by the keys D'D, the weight of these fly-wheels being determinedin direct ratio to the air-surface of the fan or blower A.

E is a sleeve rigidly mounted upon the shaft B, provided upon one endwith a flange F and upon its periphery with ratchet-teeth G G, extendingentirely around the same, two or more rows of such teeth beingpreferably provided. Over this sleeveE is loosely slipped the hollow hubof the pulley H, so as to allow the same to rotate freely thereon, thesame being held upon said sleeve E by the plate I, secured in place bythe screws J passing into the sleeve E. The hub of this pulley H isperforated radially at regular intervals around its circumference,through which pass the pawls K, having inclined ends adapted to engagethe ratchet-teeth G upon said sleeve E when motion is imparted to saidpulley in one direction to rotate said sleeve and to slip over saidteeth when such motion diminishes or ceases. These pawls Karenormallypressed into engagement with said teeth by means of spiralsprings L, resting in stops M N upon Motion is imparted in the properdirection of rotation to the fan or blower A through the belt or pulleywheel H, driven from an engine or other convenient source of power, asthe pawls K, carried by the pulley, will engage behind the teeth G ofthe rigid sleeve E. These pawls Kwill remain in such engagement untilthe power applied to the driving-pulley H diminishes or ceases. Whenthis happens, the pulley H diminishes its speed, causing the pawls K toride 11 p over the ratchet-teeth G, the shaft B,carrying the fly-wheelsC C and blower A, continuing to rotate almost without diminished speedby reason of the inertia of the flywheels 0 0 being imparted to theshaft and to said fan or blower. This will continue until thedriving-pulley regains its speed, when the ratchet-pawls K will againengage the ratchetteeth G upon the sleeve E, when the power from saidpulleywill be imparted to said shaft.

Having thus described my invention, what I claim, and desire to secureby Letters Patent of the United States, is

In a wind-stacker or the like,a fan or blower comprising adriving-shaft,fan-blades rigidlymounted upon said shaft, a pair offly-wheels keyed upon said shaft, one upon each side of said fan, asleeve rigidlysecured upon said shaft provided with two sets ofratchet-teeth running parallel upon the periphery of said sleeve, apulley journaled to revolve freely uponsaid sleeve, a plurality ofradially-disposed pawls passing through apertures in the hub of saidpulley and adapted to engage the ratchet-teeth upon said sleeve, saidpawls being arranged in two parallel rows registering with the parallelrows of ratchet-teeth, radial projections located at intervals upon theinner periphery of said pulley in alinement with said radially disposedpawls, and spiral springs interposed between the outer ends of saidradially-disposed pawls and said radial projections.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES I-IEARN.

WVitnesses:

JOHN W. MITCHELL, WM. P. POWELL.

